3928231 has 4 divisors (see below), whose sum is σ = 4135000. Its totient is φ = 3721464.

The previous prime is 3928229. The next prime is 3928247. The reversal of 3928231 is 1328293.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1328293 = 127 ⋅10459.

It is a cyclic number.

It is not a de Polignac number, because 3928231 - 2¹ = 3928229 is a prime.

It is a super-2 number, since 2×3928231² = 30861997578722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3928231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3928261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103356 + ... + 103393.

It is an arithmetic number, because the mean of its divisors is an integer number (1033750).

Almost surely, 2^3928231 is an apocalyptic number.

3928231 is a deficient number, since it is larger than the sum of its proper divisors (206769).

3928231 is a wasteful number, since it uses less digits than its factorization.

3928231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206768.

The product of its digits is 2592, while the sum is 28.

The square root of 3928231 is about 1981.9765387108. The cubic root of 3928231 is about 157.7849849948.

The spelling of 3928231 in words is "three million, nine hundred twenty-eight thousand, two hundred thirty-one".